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Priority to ECSP982652priorityCriticalpatent/ECSP982652A/en
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Casting Or Compression Moulding Of Plastics Or The Like
(AREA)
Processes Of Treating Macromolecular Substances
(AREA)
Eyeglasses
(AREA)
Abstract
La presente invención se refiere a un proceso para la fabricación de un articulo moldeado, el cual comprende los siguientes pasos: a) prepolímero es un copolímero anfifilico segmentado que comprende cuando menos un segmento hidrofólico A y un segmento hidrofílico B; b) preparar una mesofase del prepolímero que es cuando menos parcialmente bicontinua; c) introducir la mesofase obtenida en un molde oftálmico; d) desencadenar reticulación; y e) abrir el molde, de tal manera que se pueda remover el artículo moldeado. El proceso de la invención es particularmente adecuado para la fabricación de membranas y artículos moldeados oftálmicos, tales como lentes de contacto.The present invention relates to a process for the manufacture of a molded article, which comprises the following steps: a) prepolymer is a segmented amphiphilic copolymer comprising at least one hydrophilic segment A and one hydrophilic segment B; b) preparing a mesophase of the prepolymer that is at least partially bicontinuous; c) introducing the mesophase obtained in an ophthalmic mold; d) trigger crosslinking; and e) opening the mold, so that the molded article can be removed. The process of the invention is particularly suitable for the manufacture of ophthalmic membranes and molded articles, such as contact lenses.
ECSP9826521998-09-021998-09-02
PROCESS FOR THE MANUFACTURE OF A MOLDED ITEM
ECSP982652A
(en)
AN ANPHYPHILIC SEGMENTED COPOLYMER, A PROCEDURE FOR CARRYING OUT THE PREPARATION OF SUCH COPOLYMER, A POLYMERIC PRODUCT THAT IS OBTAINED FROM SUCH A COPOLYMER, A MOLDING AND A BIOMEDICAL ARTICLE THAT INCLUDES SUCH A PRODUCT, AND A CONTACT LENS THAT I BUY
Method for removing a member made of transparent polymer material and its use for producing a member made of transparent polymer such as an optical lens